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Multiscale modeling of flexible fibrous suspensions under flow. The outcome of this work will be a comprehensive theoretical framework by which microstructural information is distilled into an accurate multiscale model of fibre suspensions, readily applicable to industrial situations. This work will have a direct impact on the design capability and performance of a wide range of mechanisms and industrial processes involving fibres. The development of better models for industrially useful suspen ....Multiscale modeling of flexible fibrous suspensions under flow. The outcome of this work will be a comprehensive theoretical framework by which microstructural information is distilled into an accurate multiscale model of fibre suspensions, readily applicable to industrial situations. This work will have a direct impact on the design capability and performance of a wide range of mechanisms and industrial processes involving fibres. The development of better models for industrially useful suspensions offers a competitive advantage for a diverse range of Australian industries, from the paper manufacture sector, to the production of fibre-filled composite materials.Read moreRead less
Modelling soft filled viscoelastic solids. Wheat flour doughs are made in vast quantities daily, and improvements in processing, especially in sheeting (rolling) and extrusion are needed. To enable this we will create a novel mathematical description of the material which will be useful for predicting the shapes of processed products. Wheat breeding cycles can be shortened by using the model rheological parameters, since baking quality is closely linked to dough rheology. A number of Australian ....Modelling soft filled viscoelastic solids. Wheat flour doughs are made in vast quantities daily, and improvements in processing, especially in sheeting (rolling) and extrusion are needed. To enable this we will create a novel mathematical description of the material which will be useful for predicting the shapes of processed products. Wheat breeding cycles can be shortened by using the model rheological parameters, since baking quality is closely linked to dough rheology. A number of Australian wheats will be considered and their rheologies will be compared.Read moreRead less
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE0882926
Funder
Australian Research Council
Funding Amount
$100,000.00
Summary
Transmission Electron Microscope-Nanoindenter for Nano-Mechanical Testing. A transmission electron microscope (TEM)-nanoindenter enables us to record simultaneously the mechanical behaviour of materials under force and their structures and structural evolutions at sub-nanometre resolution. The acquisition of a TEM-nanoindenter will significantly enhance the capability of investigating the structural effect on the behaviour of materials under applied force, which is a key issue in materials scien ....Transmission Electron Microscope-Nanoindenter for Nano-Mechanical Testing. A transmission electron microscope (TEM)-nanoindenter enables us to record simultaneously the mechanical behaviour of materials under force and their structures and structural evolutions at sub-nanometre resolution. The acquisition of a TEM-nanoindenter will significantly enhance the capability of investigating the structural effect on the behaviour of materials under applied force, which is a key issue in materials science and engineering. The results obtained using the TEM-nanoindenter will reveal the fundamental origins of materials mechanical properties and will be used to improve materials processing procedures and to guide the design of stronger and lighter materials for structural applications.Read moreRead less
Mullins-type effects in soft filled viscoelastic solids. Bread dough is made in vast quantities daily, and improvements in processing,especially sheet rolling,are needed,and to enable this we propose to create a novel mathematical description of the material. Also, wheat breeding cycles can be drastically shortened by using knowledge of dough rheology, since baking quality is closely linked to rheology. The mathematical framework can then be applied to other filled viscoelastic systems, and work ....Mullins-type effects in soft filled viscoelastic solids. Bread dough is made in vast quantities daily, and improvements in processing,especially sheet rolling,are needed,and to enable this we propose to create a novel mathematical description of the material. Also, wheat breeding cycles can be drastically shortened by using knowledge of dough rheology, since baking quality is closely linked to rheology. The mathematical framework can then be applied to other filled viscoelastic systems, and work on liquid crystals may be used to develop artificial muscle material, once their rheological description and behaviour are known.Read moreRead less
Matched experimental observation and finite-element simulation of flow-induced oscillations in uniform and tapered-stiffness collapsible tubes. Flexible tubes that can be flattened are widespread in the body and can act to limit flow-rate. Limitation is usually associated with spontaneous oscillation (repetitive opening and closing). There are many candidate explanations, but none has been shown to correspond with a given experiment. Through computer models and matched experiments on this couple ....Matched experimental observation and finite-element simulation of flow-induced oscillations in uniform and tapered-stiffness collapsible tubes. Flexible tubes that can be flattened are widespread in the body and can act to limit flow-rate. Limitation is usually associated with spontaneous oscillation (repetitive opening and closing). There are many candidate explanations, but none has been shown to correspond with a given experiment. Through computer models and matched experiments on this coupled system (the fluid flow interacts with the tube shape), we seek to demonstrate for the first time that a given theory/computer model encompasses the physics controlling a given observed oscillation. The solution will find application in other flexible-structure design problems in engineering, and also potentially in medicine.Read moreRead less
Matched experiments and numerical simulations of flow-induced oscillations in uniform and tapered-stiffness collapsible tubes. Flexible tubes that can be flattened are widespread in the body and can act to limit flow-rate. Limitation is usually associated with spontaneous oscillation (repetitive opening and closing). There are many candidate explanations, but none has been shown to correspond with a given experiment. Through computer models and matched experiments on this coupled system (the ....Matched experiments and numerical simulations of flow-induced oscillations in uniform and tapered-stiffness collapsible tubes. Flexible tubes that can be flattened are widespread in the body and can act to limit flow-rate. Limitation is usually associated with spontaneous oscillation (repetitive opening and closing). There are many candidate explanations, but none has been shown to correspond with a given experiment. Through computer models and matched experiments on this coupled system (the fluid flow interacts with the tube shape), we seek to demonstrate for the first time that a given theory/computer model encompasses the physics controlling a given observed oscillation. The solution will find application in other flexible-structure design problems in engineering, and also potentially in medicine.Read moreRead less
Ion Implanted Polymers as New Plastic Electronic and Superconducting Materials. A current focus of the electronics industry is developing electronic circuitry and devices on plastic. Such 'soft electronics' offer significant benefits over conventional 'hard' electronics including low cost large-scale production, mechanical flexibility and chemical versatility. We recently discovered that plastic electronic and superconducting materials could be created using a process called ion implantation. ....Ion Implanted Polymers as New Plastic Electronic and Superconducting Materials. A current focus of the electronics industry is developing electronic circuitry and devices on plastic. Such 'soft electronics' offer significant benefits over conventional 'hard' electronics including low cost large-scale production, mechanical flexibility and chemical versatility. We recently discovered that plastic electronic and superconducting materials could be created using a process called ion implantation. This project aims to develop these new materials for potential applications including plastic superconducting electronics, low-cost lightweight plastic circuitry for use with other organic/inorganic electronic materials and electrodes for interfacing with biological systems to create biosensors and biomolecular electronics.Read moreRead less
Nanofabrication of Organic (Plastic) Semiconductor and Superconductor Devices. Organic crystals and thin-films are the first known materials to display all four regimes of electrical conduction - insulator, semiconductor, metal and superconductor. Additional properties such as self-assembly, biocompatibility, molecular level control over properties and flexibility give them exceptional prospects for future industrial applications. We will fabricate organic transistors and conduct detailed invest ....Nanofabrication of Organic (Plastic) Semiconductor and Superconductor Devices. Organic crystals and thin-films are the first known materials to display all four regimes of electrical conduction - insulator, semiconductor, metal and superconductor. Additional properties such as self-assembly, biocompatibility, molecular level control over properties and flexibility give them exceptional prospects for future industrial applications. We will fabricate organic transistors and conduct detailed investigations of their electrical and magnetic properties to develop a fundamental understanding of these new materials. Most significantly, we will make the first use of an atomic force microscope-based oxidation lithography technique to fabricate nanoscale quantum devices that exploit the full range of conduction in a single material.Read moreRead less
Flow-induced oscillation in flexible tubes: experimental and numerical investigation of mechanism and onset. We seek to understand when instability arises in flow over very deformable structures. This will help us to design highly flexible structures specifically either to avoid the danger of flow-induced oscillations, which may be damaging (cardiac surgery, sails, parachutes), or in other circumstances to take advantage of them as an innovative way involving no sliding-parts mechanisms to crea ....Flow-induced oscillation in flexible tubes: experimental and numerical investigation of mechanism and onset. We seek to understand when instability arises in flow over very deformable structures. This will help us to design highly flexible structures specifically either to avoid the danger of flow-induced oscillations, which may be damaging (cardiac surgery, sails, parachutes), or in other circumstances to take advantage of them as an innovative way involving no sliding-parts mechanisms to create vibration, or flow pulsation, or sound, or motion (as in swimming-pool cleaners). Confidence in designing with highly flexible tubes will allow minimal resource consumption in manufacture of products to transport fluids, and will allow design use of the flow limitation property, whereby such a tube can control flow-rate.Read moreRead less
Exploiting the properties of gold nanoparticles for nanolithography using visible wavelengths. The next generation of nano-devices, such as biosensors and molecular electronics, will require nanopatterning as part of the production process. Conventional optical lithographies cannot provide sufficient resolution, and alternative techniques, such as e-beam lithographies are expensive. This project aims to demonstrate a solution to this problem with obvious commercial benefit. It is the first t ....Exploiting the properties of gold nanoparticles for nanolithography using visible wavelengths. The next generation of nano-devices, such as biosensors and molecular electronics, will require nanopatterning as part of the production process. Conventional optical lithographies cannot provide sufficient resolution, and alternative techniques, such as e-beam lithographies are expensive. This project aims to demonstrate a solution to this problem with obvious commercial benefit. It is the first time a multidisciplinary team has made such a concerted effort to understand the unusual science of gold nanoparticles and will strengthen Australia's already considerable reputation in this field.Read moreRead less